( >44 ) 
in Mercury, it ended exaftly at the mark where the 
Aoth in Water ended j and this was obferv d by fe- 
deral Perfons as well as myfelf. 
Then I weigh’d 14 penny- weight of the Mercury 
(in which 1 made- the Experiments) fir ft in the Air, 
then in Water, where it loft only one penny-weight 
and one Grain of its Weight* that is it weigh d m 
Air 436 Grains, and in Water 311, fo that its fpe- 
rifick gravity was to that of W ater as 13,44 to i» 
As to the golden Ball which had Varniih and Ce- 
ment upon it to keep the Mercury from finking into 
it I found it to weigh as follows, 
’ Ounces dvvt. gr. 
It weigh’d in Mercury 1 oo 18 or 498 gr. 
in Water 5 01 00 or 2424 gr. 
in Air 5 °7 09 or 2577 gr. 
I took the Wire and Pendulum of a long Pendulum 
Clock, and having faften’d the golden Ball at the end 
of the Wire under the pendulous Weight that fervd 
for the Clock, in order to make the Vibrations of the 
golden Ball in the Mercury continue longer, I did 
not find it to keep on the motion above one f wing or 
two the longer for that help* neither did a round 
Ball of Lead placed upon the faid Wire, juft above 
the furface of the Mercury, help any mores and as I 
found fome Inconveniences in thefe two laft ways of 
making the Experiment, I rather chufe to rely upon 
thofe made with the Golden Ball hanging by a filken 
Thread of 39,2 Inches long, meafunng from the 
point of fufpenfion to the Center of the Ball. 
V. An 
